AIS Thailand
- Country: Thailand
- Type: Commercial
- Website: www.ais.co.th
- Update: 05-02
AIS (Thai: แอดวานซ์ อินโฟร์ เซอร์วิส; English: Advanced Info Service) is one of the largest mobile operators in Thailand, founded in 1986 and headquartered in Bangkok, with a focus on mobile communications, internet, and other businesses, and has nearly 40 million subscribers (March 2016 quarterly data), and is a member of the a member of Bridge Alliance.